I've been looking for this short story for the past couple of days. I definitely remember reading sometime in the last 4 years. It involves a dimension or plane of existence trying to breach into ours and it breaks down our normal physics or mathematics or something similar
For anyone wondering, the SCP Foundation is a website hosting many fan stories that make up the universe of the the SCP Foundation. The Foundation is a secret global organization that works in the shadows to protect the world from all things alien, mystical, lovecraftian or down right wierd. Their creed is in the name Secure Contain Protect
There's no other dimension or malevolence in there, but the "breaking up of our mathematics" happens in Luminous by Greg Egan (1995). Could this be what you're looking for?
In the story, it is actually us that unwittingly tap into the "outer plane" (which is conterminous to ours), harrying its inhabitants - who retaliate in self-defense.
Could it be The Gods Themselves by Asimov?
The main plot-line is a project by those who inhabit a parallel universe (the para-Universe) with different physical laws from this one. By exchanging matter from their universe—para-Universe—with our universe, they seek to exploit the differences in physical laws. The exchange of matter provides an alternative source of energy to maintain their universe. However, the exchange will likely result in the collapse of the Earth's Sun into a supernova, and possibly even turning a large part of the Milky Way into a quasar. There is hope among those in the para-Universe that the energy explosion does happen in our universe.